You spent your 20s building an inventory of the basics, and now it's time to step up your game. Your 30s will bring many milestones, and between all the personal and professional events — promotions, weddings, black-tie parties, etc. — you'd better have the necessary outfits.

That means a formal dress, tailored pants, and a sexy blouse that isn't quite as revealing as the one you wore on your 25th birthday. Consider this your wardrobe checklist and start scrolling to shop the essentials.